<div role="tab" [attr.aria-expanded]="nzActive" class="ant-collapse-header" (click)="clickHeader()">
  <i nz-icon type="right" class="arrow anticon-right" *ngIf="nzShowArrow"></i>
  <ng-container *nzStringTemplateOutlet="nzHeader">{{ nzHeader }}</ng-container>
</div>
<div class="ant-collapse-content"
  [class.ant-collapse-content-active]="nzActive"
  [@collapseState]="nzActive?'active':'inactive'">
  <div class="ant-collapse-content-box">
    <ng-content></ng-content>
  </div>
</div>